initial commit

bash_history.rb

@@ -0,0 +1,59 @@
+#!/usr/bin/env ruby
+
+require 'digest/md5'
+require 'gdbm'
+require 'yaml'
+
+class BashHistory
+  attr_reader :db
+  OPTIONS = {
+    :file => File.expand_path("~/.bash_history"),
+    :archive_file => File.expand_path("~/.bash_history.db"),
+  }
+  def initialize(opts = {})
+    @options = OPTIONS.merge(opts)
+    _parse
+  end
+  def db
+    @db ||= GDBM.new(@options[:archive_file])
+  end
+  def keys; db.keys; end
+  def keys_to_i; keys.map {|i| i.to_i }; end
+  def values; db.map {|k,v| _yl(v) }; end
+  def commands; values.map {|v| v[:cmd] }; end
+  def _yd(data); YAML.dump(data); end
+  def _yl(data); YAML.load(data); end
+  def _md5(data); Digest::MD5.hexdigest(data); end
+
+  def find(pat)
+    values.select {|v| v if v =~ /#{pat}/ }
+  end
+
+  def _parse
+    open(@options[:file]) do |f|
+      f.each_line do |line|
+        if line =~ /^#(.*)$/
+          l = f.readline.chomp
+          db[_md5(l)] = _yd({:cmd => l, :time => Time.at($1.to_i)})
+        else
+          db[_md5(line.chomp)] = _yd({:cmd => line.chomp})
+        end
+      end
+    end
+  end
+  def render(file)
+    File.open(file,'w+') do |f|
+      values.each do |v|
+        f.write("#" + v[:time].to_i.to_s + "\n") if v[:time]
+        f.write(v[:cmd] + "\n")
+      end
+    end
+  end
+end
+
+if $0 == __FILE__
+  bh = BashHistory.new
+  p bh
+  p "storing #{bh.keys.count} commands"
+end
+